三相感應電機 rpm 與 頻率轉換 - 考試
By Bennie
at 2014-02-15T17:46
at 2014-02-15T17:46
Table of Contents
題目已知一台Y接三相感應電動機參數 480V 25hp 60Hz 4極。
輸出功率 Po=11570.44W
電動機之轉速nr=1760.4 rpm
最後在求輸出轉矩的時候老師寫了一個算式
Po 11570.44
Tout = ---- = -------------
Wr 1760.4
2π x ------
60
在分母的部分我看不太懂,老師直接把 nr (rpm)/60 就變成頻率(Hz)
可是頻率f不是應該等於 pn /120 嗎?
p n
f = -------
120
如果要直接把 n/60 = f,那不是應該要限定在兩極的情況下才能用嗎?
為甚麼可以直接除呢?
請幫忙解惑一下,感謝。
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